Linear electromagnetic pump having concentric fluid passages
United States Patent 2808002

Inventors:
Erwin, Arthur F.
Publication Date:
10/01/1957
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Assignee:
ALLIS CHALMERS MFG CO
Primary Class:
417/50
Other Classes:
310/11
International Classes:
H02K44/06; H02K44/00
Foreign References:
DE534214C